import java.io.IOException;
import java.util.Scanner;

public class nnnn {
    public static void main(String[] args) throws IOException {
      /*Scanner scanner =new Scanner(System.in);
        int s=scanner.nextInt();
        System.out.println(s<60?"不合格":s<80?"中":s>=80&&s<90?"良好":"优秀");*/
       /* int a=1,b=1;*//*c,d*//*;
        boolean f;
        f=--a==0&&--b>0;
       *//* c=a++; //c=a a=a+1
        d=++b; //d=b+1 b=b+1*//*
      System.out.println(a+" "+b+" "+f);*/

       //char x=(char)System.in.read();
        /*System.out.println();
       System.out.println(x >= 'a' && x <= 'z');
        int a=2,b=3;
        boolean x=a<5&&(b=9)>6;
        System.out.println(a+""+b+""+x);*/
      /*  boolean b = true;
        if(b == false)  //如果写成if(b=false)能编译通过吗？如果能，结果是？
            System.out.println("a");
        else if(b)
            System.out.println("b");
        else if(!b)
            System.out.println("c");
        else
            System.out.println("d");*/
      
    }
}
